Noiseless gear



Jan. 4,1927. 1,613,489

, J. M. TAYLOR NOISELESS GEAR Filed Jan. 30. 1925 "Paiemed Jan.' 4, 1927.

UNITED STATES 1,613,489 PATENT OFFICE.

JOHN M. TAYLOR, F BBIDGEPORT, PENNSYLVANIA, ASSIGNOR TO DIAMOND STATE FIBRE COMPANY, 0F BRIDGEIPORT, PENNSYLVANIA, A CORPORATION 0F DELA- WARE.

NOISELESS GEAR.

Application filed January 30, 1925. Serial No. 5,809.

This invention relates to noiseless gear and like construction, and more particularly to gears utilizing an artificial resin, such as bakelite, as the material affording the den sired characteristic of comparative noiselessness. It is to be understood, however,

i that the invention is not restricted to the use of an artificial resin, since other substances may successfully be used instead. The principal object of the invention is to provide alnoiseless gear or like element having a novel and advantageous distribution of sound-reducing and other materials, affording economy of the former with an article of superior strength and durability.

Another object of the invention is to provide a -noiseless gear comprising both metal and a noise-reducing material in novel and highly efficient combination.

Several embodiments of my invention are illustrated in the attached drawings, in which:

Figure l is a sectional perspective view of a gear blank made in accordance with my invention;

Figs. 2 and 3 are true vertical sections illustrating modifications within the scope of the invention, and

Figs. 4 and 5 are, respectively, face views of two different forms of reinforcing element.

With reference to the drawings, and particularly to Fig. 1, I have illustrated a gear: blank in which the hub portion web 2 consist of a plurality of metal plates or disks 3bound together through thesaid hub portion by bolts 4. Other forms of securing means, may be employed, such as rivets or welding. i

In the present instance, I prefer to employ face plates 5 on the faces of the hub, these plates constituting segt/s/othe head of the bolt and for the nuts, and preventing mutilation of the disks 3.4 As clearly illustrated, those of the disks 3 which form the web 2 are of sufficiently great diameter to extend into and through the rim portion i of the blank fromthe inner surface of the latter to the outer, the rim, however, being of greater width than the web portion 2. The outer portions of the disk 3 are so bent or formed as to aiord a preferably uniforml distribution of these parts across the entire width of the rim, as clearly illustrated. The

o uter rim. portions of the disk 3 are `perfo- 1 and thev rated, as indicated in Fig. 4, and are e111- bedded in or laminated with a suitable material, such as artificial resin or fibrous niateria] combined with an artificial resin capable of giving the gear the desired noiseless characteristics. Although I prefer to use an artificial resin such as bakehte for this purpose, it will be understood, as previously stated, that natural resins and other substances may be found having Athe characteristics requisite for such use.

In the drawings, I have designated this material by the reference numeral 7 and by reason of the perfbrations in the outer rim portion of the disk 3, itl will be apparent that this material will be thoroughly bond-r ed with the disks.

Where an artificial resin is employed, it may be appfied either in its initial orV intermediate stage and 'subjected in the usual manner to Iheat and pressure sufficient to convert it to its hard infusible final state. Instead of employing the unmixed resin, the latter may be combined withy suitable fibrous material, and if desired, the Yrim portion may consist ofa laminated structure consisting of layers of aper or fabric impregnated with the arti cial resin in its hard infusible state and interspersed with the metal disks 3.

Numerous modifications are possible without departure from the essential features ofthe inventioxnand several of such modifications are herein illustrated. Thusin Fig. 2 I have shown the hub portion 1 formed as previously described by laying together a number of suitably shaped metal disks, these being secured together by bolts 4 or other suitable securing means. In the web portion 2 of the blank, however, the elements 3 are spaced apa-rt.` Those of the elements 3 in that part of the hub portion l to which the web portion 2 attaches are made n alternately of small diameter and of suficiently large diameter to .extend up through the web' portion 2 to the.point Where the web joins the rim portion 6. The spaces intermediate the elements in the web portion 3 are occupiedy 'by the bakelite or other synthetic resin in its hard infusible state, and this may be either inthe form of the gum alone or in the form of the 'laminated gum impregnated structure previously described. In this instance, the rim or tooth-receiving portion 6 is preferably comparts of the yposed entirely of a laminatd gum impreg- 1 trated nated body,webs of paper or fabric eing employed to form this laminated portion in the manner previously described, and the portion 6 being closely bonded'or integral with the gum in the web arev preferably apertured for the purpose previously described.

In the embodnnent 1, formed preferably ofthe laminated artificial resin body previously described comprisin webs-ofpaper, fabric or other suitl able rous material impregnated and bonded together by the artificial resin, which' after lmpregnation and assembly' has been converted to its hard infusible state.

Obviously there are many other modifications that may be made without departure fromthe inventlon in Vits essential features Under some "circumstances, it may be desirable to employ wire mesh, as illustrated in.

Fig. 5, in place of the metal disks illusin Fig. 4. In this instance, the resin or other material willextend completel through the lentire'iggea'r andv into the hu portionl-as well-as'the rim and web` por' ortion 2. Those disks 3 exten ing into the web,

l of Fi.' 3, plates orv disks 3 are utilized only int e hub portion' the web 2 and rim 6 ofthe blank beingI of sound-reducing material surroundln disks being perforated,

tions. Under these circumstances, it is possible to eliminate the bolts 4-01' analogous parts. In the modifications described, the

ftionand a non-metallic toothed' ortion including a synthetic resin inhar g infusible and insoluble condition reinforced by metal extensions from said hub.

plates 3 may be perforated throughout and v 2. A ear having a hub comprising a plurality o metal disks, and a toothe portio bonded with the outeredges of said dis 3. A gear comprising a lurality of metal discs, mechanical means inding the' discs together at the' hub, the outer portions of the and an articial resin body surrounding andembedding said youter perforated portions.

JOHN M. TAYLOR. 

